# Electrical measurement : some explanations

In the electronics and electrical sector, for the measurement of electricity flowing through electrical cables or any electrical installation, electricians use electrical measuring devices. Depending on the variable he wants to quantify, he has at his disposal tools that help him in his task. What are the variables that measure électricité ? What are the measuring devices existants ? The answers to his questions are found later in this article.

This is a crucial concept, particularly for energy efficiency.

## What are the different units of measurement électrique ?

Electricity is an energy that can be quantified through electrical measurement. In the electrical and electronics sector, electrical measurement makes it possible to measure several variables: voltage, current, power, energy and electrical resistance. Electric current is created when negative charges move thanks to electrons. The movement of negative charges carried by electrons generates electrical current.

### The electrical voltage

The electrical voltage is used to quantify the electrical potential contained in the electrical conductor. To determine the electrical voltage, the unit of measurement used is the Volt (V). The voltmeter is required to effectively measure the electrical voltage.

### The intensity of electricity

Represented by the symbol A, the electrical intensity is estimated with the Ampere. The intensity applies to the flow of electrons in the electrical current. To better explain the intensity of the electrical current, it is often compared to the flow rate of water in the pipe when the water tap is open. With this measurement variable, it is possible to determine the speed at which electrons circulate in an electrical circuit. To measure the intensity, the electrician uses an ammeter.

### The power

It is evaluated in Watts (W) and applies to current and voltage. To better explain the measurement variable of power, it is necessary to use the water jet as a basis. The power of a water jet applies to the compression and flow of water.

### The energy

Generally measured in Kilowatt hours, energy is the power that is used over a period of time. With energy, we estimate the population’s electricity consumption.

### The electrical resistance

Here is measured, the ability of a material to resist the circulation of electricity. Within an electrical circuit, the electrical resistance is used to transform electrical energy into another form of energy. The multimeter is used to measure the resistance of the electrical current and its unit of measurement is the ohm (Ω).

### The frequency

With regard to alternating current, frequency corresponds to the number of round trips that electricity makes when it flows through conductors. Its unit of measurement is expressed in Hertz (Hz).

### The electric field

The electric field is the force that attracts or removes other electric charges. This variable corresponds to the force emitted around it by a material while electricity is not flowing and it is under voltage. Its unit of measurement is the volt per meter (V/m).

This is a brief presentation of the different units of electricity measurement.

## Electrical measuring instruments

Electrical measurements are used to find out about the energy constraints you may encounter during your electrical installations. To determine the electrical measurement, there are many measuring instruments available. Here are some instruments to find in the electrician’s toolbox.

### The multimeter

In addition to a few device specific measurements, the multimeter can be used to quantify a number of variables. This instrument is used to measure voltage, resistance, intensity and continuity. In addition, it offers several instrument variations: the analog multimeter, the amperometric multimeter and the digital multimeter. To read the measurement on the analog multimeter, you must rely on the arrangement of the hands on the dial. While on the digital multimeter, the values are read on the digital display.

### Current clamps

It is used to measure the intensity of the current flowing through the various electrical conductors. Its use is simple, with a pinch on the conductor, it is easy to determine the intensity of the electrical current. There are two types of current clamps: rigid jaw clamps and flexible jaw clamps. With flexible jaw pliers, the measurement is made specifically on alternating current. And for rigid jaw pliers, the measurement is made on alternating and direct current.

### The ammeter

It is a device used to measure the electrical intensity within an electrical circuit. There are several types of ammeters, namely the digital ammeter and the analog ammeter. The analog ammeter evaluates the average value of the current flowing in an electrical circuit. The digital ammeter estimates in volt the voltage realized during a Shunt (it is the resistance of the current).

The list of instruments is not exhaustive and does not cover all devices used in electrical current measurement.

In short, electrical measurement is used to measure the units of electrical current. To read the values, the use of measuring instruments is required. There are several measuring instruments available for this purpose.

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